EP2488290B2 - Procédé et utilisation pour le broyage - Google Patents

Procédé et utilisation pour le broyage Download PDF

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Publication number
EP2488290B2
EP2488290B2 EP09784018.5A EP09784018A EP2488290B2 EP 2488290 B2 EP2488290 B2 EP 2488290B2 EP 09784018 A EP09784018 A EP 09784018A EP 2488290 B2 EP2488290 B2 EP 2488290B2
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EP
European Patent Office
Prior art keywords
centrifugal mixer
fat mass
mass
shaft
mixer
Prior art date
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Active
Application number
EP09784018.5A
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German (de)
English (en)
Other versions
EP2488290B1 (fr
EP2488290A1 (fr
Inventor
Peter Braun
Stefan Gerber
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Buehler AG
Original Assignee
Buehler AG
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Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G1/00—Cocoa; Cocoa products, e.g. chocolate; Substitutes therefor
    • A23G1/0003—Processes of manufacture not relating to composition or compounding ingredients
    • A23G1/0026—Mixing; Roller milling for preparing chocolate
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G1/00—Cocoa; Cocoa products, e.g. chocolate; Substitutes therefor
    • A23G1/0003—Processes of manufacture not relating to composition or compounding ingredients
    • A23G1/0026—Mixing; Roller milling for preparing chocolate
    • A23G1/0033—Chocolate refining, i.e. roll or mill refining
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G1/00—Cocoa; Cocoa products, e.g. chocolate; Substitutes therefor
    • A23G1/04—Apparatus specially adapted for manufacture or treatment of cocoa or cocoa products
    • A23G1/10—Mixing apparatus; Roller mills for preparing chocolate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/70—Pre-treatment of the materials to be mixed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/70—Pre-treatment of the materials to be mixed
    • B01F23/71—Grinding materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/80—After-treatment of the mixture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1121—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades pin-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B01F27/707—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms the paddles co-operating, e.g. intermeshing, with elements on the receptacle wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/40—Mounting or supporting mixing devices or receptacles; Clamping or holding arrangements therefor
    • B01F35/41—Mounting or supporting stirrer shafts or stirrer units on receptacles
    • B01F35/412—Mounting or supporting stirrer shafts or stirrer units on receptacles by supporting both extremities of the shaft
    • B01F35/4122—Mounting or supporting stirrer shafts or stirrer units on receptacles by supporting both extremities of the shaft at the side walls of the receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/50—Mixing receptacles
    • B01F35/512—Mixing receptacles characterised by surface properties, e.g. coated or rough
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners

Definitions

  • the invention relates to a method for processing a fat mass and the use of a centrifugal mixer for processing a fat mass.
  • fat masses are understood to mean products with a fat content for food production. These are solid and/or liquid products, as well as solid and/or liquid products that are produced in the centrifugal mixer. It is preferably a matter of pasty or powdery masses.
  • the processing of fat masses is a multi-step process.
  • the components of the fat mass are usually mixed together in a first step.
  • a component within the meaning of this application is to be understood as a substance or ingredient that is either suspended as a solid in the fat mass or occurs in dissolved form or is added to it.
  • a chocolate mass can consist of the components cocoa butter, sugar, milk powder and cocoa powder.
  • the components are first mixed in a stirred tank.
  • the fatty mass is usually rolled through one or more rolling mills, with the solids suspended in the mass being further broken up.
  • the mass can first be pre-rolled in a 2-roll mill before rolling in a 2-, 3- or 5-roll mill.
  • the fat mass is largely homogenized. After rolling, the fat mass can be subjected to further steps, such as conching, with other components of the mass being able to be added depending on the recipe.
  • the fat mass can then be subjected to further refinement steps.
  • the components are first mixed in a wet crushing device and then crushed in the mill.
  • wet comminution methods are also known in which mixing and comminution take place in the same process room.
  • wet comminution can take place in an agitator ball mill or in a drum mill with beater bars or beater knives.
  • a disadvantage of the known methods is that the mixing of the components cannot take place continuously and the fat mass can therefore only be produced in a batch process. This disadvantage also applies to the simpler products, since the mixing and grinding in the mill cannot be carried out continuously or at most semi-continuously.
  • Another disadvantage is that, depending on the composition of the fat mass, the rolling mills have to be readjusted to ensure that the end product is always of good quality. This adjustment is sometimes time-consuming and requires an interruption in the production process. Depending on the complexity of the rolling mill, the operator may also need a great deal of experience.
  • One object of the present invention is therefore to create a method and a use of the type mentioned at the outset, which overcomes the disadvantages of the known and in particular allows a continuous processing of a fat mass. According to the invention, this object is achieved with a method having the features of claim 1 .
  • the invention exploits the fact that continuous processing of a fat mass can be achieved by using a centrifugal mixer.
  • Centrifugal mixers are known per se. For example, describes the WO 2007/066362 such a mixer.
  • the substance to be processed is guided in a preferably substantially horizontally arranged drum.
  • a rotating shaft which is at least partially pinned.
  • the pins can be arranged in a spiral shape. Due to the high rotational speed of the pins, the introduced material is thrown against the inner walls of the drum by the effect of centrifugal force. The introduced substance is constantly mixed by the pins.
  • the density of the pins can vary along the shaft. In the case of pins arranged in a spiral, the pitch of the spiral can change, in extreme cases to such an extent that reverse conveyance is made possible.
  • the pins can be of the same type, e.g. have a round cross-sectional area of the same diameter. Alternatively, different types of pins can be arranged on the shaft, for example with different cross-sectional areas (polygonal, elliptical, round) or with different diameters.
  • the pins are preferably cylindrical, but they can also be club-shaped or shovel-shaped.
  • an open centrifugal mixer is used. This allows the masses to be discharged freely so that there is no accumulation of the mass.
  • the end of the drum is open and not or only slightly tapered.
  • the mass can also be expelled by a discharge device, for example a screw conveyor.
  • a discharge device for example a screw conveyor.
  • free discharge can be ensured, for example, by a concentric opening.
  • the centrifugal force forms a thin layer of the mass on the inner wall of the centrifugal mixer.
  • energy is introduced into the mass, which is relatively even thanks to the thin layer takes place over the entire volume of the processed mass.
  • the mass in the centrifugal mixer is advantageously kept at a preselectable temperature.
  • the centrifugal mixer is temperature-controlled, for example by means of a double-wall structure, i.e. cooled or heated.
  • a fat mass within the meaning of the application is understood to be a mass that consists of fats and oils to an extent of more than 10% by weight.
  • the fat content of the mass is preferably more than 25% by weight, particularly preferably more than 30% by weight.
  • the method according to the invention is used for processing fat mass in the food industry, namely cocoa or chocolate mass.
  • Preferred components are therefore vegetable or animal fats such as butter, cocoa butter, lard and the like, but also oils such as palm oil, coconut fat, sunflower oil and the like and mixtures thereof.
  • Further components of the fat masses preferably processed by the method according to the invention are, for example, cocoa powder, cocoa mass, sugar, sugar substitutes, vanilla powder, icing sugar, milk powder, cornstarch, nut or almond powder and the like.
  • Further preferred components are, for example, honey, glucose syrup, maple syrup, caramel syrup, but also solid components such as nuts, almonds or raisins and the like, and mixtures thereof.
  • the mass is always pushed further in the processing direction and is not backed up due to the free outlet of the centrifugal mixer. At the same time, the mass is under the influence of centrifugal force. So the whole mass is at a distance to the shaft.
  • the mass forms a thin layer on the wall, therefore the entire mass is processed with essentially the same speed of the pins.
  • the speed of the shaft is preferably below 6000 revolutions per minute (rpm), particularly preferably between 500 rpm and 5000 rpm, very particularly preferably between 1000 rpm and 4000 rpm.
  • Typical centrifugal mixers used have a drum internal diameter of 50-500 mm.
  • the pin speeds in the edge area, to which the mass is exposed, are between around 5 km/h and around 600 km/h.
  • the diameter of the suspended particles of the components is reduced.
  • the diameter of the constituents is particularly preferably reduced essentially to a value below 200 ⁇ m, very particularly preferably essentially below 150 ⁇ m.
  • the residue that remains on a sieve with a mesh diameter of 200 ⁇ m or 150 ⁇ m, respectively is still over 99% before treatment in the centrifugal mixer, for example, and after Treat less than 90% of the total weight of the fat mass.
  • the proportion by weight of the mass whose components have a diameter of less than 200 ⁇ m or 150 ⁇ m is less than 1% of the total mass before treatment in the centrifugal mixer and more than 10% after treatment. The diameter of the components is thus reduced.
  • At least one parameter that is characteristic of the consistency of the fat mass is set to a predetermined value or limited to a value range.
  • the fat mass is preferably rolled in order to further reduce the average diameter of the suspended particles in the fat mass. This is preferably done in a 2-, 3- or 5-roll mill.
  • the components of the fat mass can be premixed prior to comminution in the centrifugal mixer.
  • the components of the fat mass can be pre-comminuted before being comminuted in the centrifugal mixer, for example in a rolling mill.
  • the respective components can, for example, be pre-comminuted separately and then combined.
  • a further preferred embodiment of the invention provides that the components of the fat mass are both premixed and precomminuted prior to comminution in the centrifugal mixer.
  • the components of the fat mass can be further comminuted and/or mixed in at least one further centrifugal mixer.
  • the fat mass can be further processed in further steps, for example by conching.
  • the centrifugal mixer and/or the other production steps can be used in a production cycle be traversed by the fat mass once or several times.
  • the components of the fat mass can be processed in a further step in a device for wet comminution, in particular an agitator ball mill.
  • the diameters of lumpy components of the fat mass are reduced during the treatment in the centrifugal mixer.
  • Chunky components are components of the fat mass, such as nuts, almonds, waffles, biscuits, brittle, pralines, etc. or pieces thereof which, when added to the fat mass, have an average diameter of more than 1mm, in particular more than 5mm.
  • the diameter of the chunky components is reduced during treatment in the centrifugal mixer. This means that the focus of the size distribution of the diameters after the treatment is on a smaller diameter than before the treatment. For example, if the typical particle size of the lumpy components before treatment in the centrifugal mixer was greater than 5mm, it is smaller than 5mm afterwards; if it was larger than 1mm before treatment in the centrifugal mixer, for example, it is smaller than 1mm after treatment.
  • the reduction in diameter can be determined using a sieve.
  • the proportion of lumpy components that remains in a sieve with a certain mesh size, for example a mesh size of 5 mm or 1 mm, before treatment in the centrifugal mixer is greater than after treatment in the centrifugal mixer.
  • a further solution to the present problem consists in preventing the disadvantages of the known processing methods for fat masses by using a centrifugal mixer according to the features of claim 10 .
  • a major advantage of using a centrifugal mixer is that the components can be mixed continuously. In addition, the average diameter of suspended particles in the fat mass can be reduced. Another advantage is that the parameters that are characteristic of the consistency of the fat mass, such as viscosity, moisture, homogeneity and/or granularity, can be adjusted to predetermined values by suitably selecting the speed of rotation of the shaft in the centrifugal mixer.
  • centrifugal mixers can be used one after the other or in parallel. As a result, a continuous processing of a fat mass is possible even with large throughputs.
  • the centrifugal mixer is used when processing a cocoa or chocolate mass.
  • a centrifugal mixer can be used for processing a spread.
  • Common spreads are, for example, nougat or nut masses, peanut butter and the like.
  • a centrifugal mixer can be used to process fat masses that contain chunky components such as nuts, almonds, waffles, biscuits, brittle, pralines, etc. or pieces thereof.
  • the diameter of the chunky components is reduced during treatment in the centrifugal mixer.
  • centrifugal mixer is particularly preferably used to liquefy a fat mass.
  • Several centrifugal mixers can also be used in succession. It can also be provided that several centrifugal mixers of different sizes and/or with different shaft speeds are used one after the other.
  • a production line for processing fat masses allows efficient and continuous processing.
  • the fat mass is processed in one direction, the processing direction.
  • the components are present individually and are first mixed in the processing direction and the solid components are comminuted and/or suspended.
  • the production line includes at least one centrifugal mixer.
  • the production line includes one, two, three or more centrifugal mixers.
  • the centrifugal mixers can be arranged either one behind the other or next to one another in the processing direction.
  • the production line can include at least one rolling mill, which is arranged after the centrifugal mixer in the processing direction.
  • This at least one rolling mill is preferably a 2-, 3- or 5-rolling mill.
  • several, in particular two, 2-, 3- or 5-roll mills are arranged downstream of the centrifugal mixer in the processing direction.
  • the rolling mills can be arranged one behind the other (in series) or next to each other, i.e. in parallel. With a serial arrangement, the fat mass can be further refined over several rolling mills, while with the parallel arrangement the throughput of the production line can be increased.
  • the at least one centrifugal mixer preferably replaces the stirred tank, the mill and/or the roughing mill of a conventional production line.
  • a further embodiment of the invention provides that at least one rolling mill is arranged upstream of the centrifugal mixer in the processing direction.
  • This at least one rolling mill is preferably a 2-rolling mill.
  • the at least one centrifugal mixer preferably serves to set the parameters which determine the consistency of the fat mass.
  • At least one agitator and/or mixer is arranged upstream of the centrifugal mixer in the processing direction.
  • a further embodiment of the invention provides that at least one rolling mill and a device for conching or partial conching are arranged upstream of the centrifugal mixer in the processing direction. Depending on the composition of the fat mass, undesirable agglomerations can occur during conching, which are at least partially broken up again in the centrifugal mixer. The mass can then be fed back to a rolling mill and/or a conching device.
  • At least one device for wet comminution for example an agitator ball mill or a beating or friction strip mill, is arranged in the draw frame.
  • a further embodiment of the invention provides for the centrifugal mixer to be arranged in the production line in such a way that the fat mass or parts thereof pass through the centrifugal mixer at least twice.
  • the mass can be guided through the production line in at least one circuit.
  • the components of the fat mass can, for example, first be stirred and comminuted in a centrifugal mixer, then either rolled, conched and/or treated in a device for wet comminution and then all or part of the production steps can be repeated.
  • the centrifugal mixer is run through again, the components can be stirred and/or comminuted and/or refined again.
  • they can be charged in the centrifugal mixer with an active atmosphere that differs from the ambient atmosphere. This preferably has a different pressure and/or different temperature and/or different composition than the ambient atmosphere, so that ingredients are added to and/or removed from the fat mass.
  • the centrifugal mixer preferably comprises an essentially horizontally arranged drum and a shaft arranged coaxially in the drum, the centrifugal mixer allowing free discharge and the shaft being mounted on two sides.
  • the drum may be oriented so that the outlet opening is located below the inlet opening, so that the expulsion of the mass by gravity is favored.
  • the shaft is preferably provided with pins on at least one section, which are preferably arranged spirally along the shaft.
  • a support for the first bearing of the shaft is usually located on the side of the drum where the inlet is located.
  • the bearing for the second bearing is provided at the other end of the shaft.
  • the holder for the second bearing can be connected to the drum, for example via holding webs.
  • the bracket can also be attached to a base plate so that the two bearings are decoupled.
  • a free discharge of the mass can be ensured by a concentric or quasi-concentric outlet opening.
  • the opening points in the direction of the shaft axis.
  • the centrifugal mixer has a preferably essentially horizontally arranged drum and a shaft, the inner wall of the drum being structured, in particular such that the adhesion of a mass to be conveyed to the inner wall is influenced, in particular increased compared to a smooth wall.
  • the mass For the targeted processing of fat masses, it is important that the mass does not remain in the mixer for too short or too long, but that it is exposed to the pins for a defined period of time. For this purpose, the mass should be driven evenly through the mixer. On the one hand, it must be avoided that the mass or parts of it stick to the wall, and on the other hand that the mass or parts of it slip through the drum unprocessed.
  • Wall adhesion can be influenced by structures on the inner wall of the drum.
  • the inner wall can be roughened and/or corrugated and/or toothed and/or provided with pins.
  • the temperature of the centrifugal mixer can be controlled, for example by means of a double-wall structure. It can therefore be cooled or heated, so that the wall of the drum and/or the mass in the centrifugal mixer can be kept at a preselectable temperature.
  • FIG. 1 shows a schematic and simplified representation of the processing of fat masses with at least one centrifugal mixer 1.
  • the processing direction corresponds to the processing direction 11.
  • the fat mass m or the individual components k of the fat mass to be mixed are first added to the centrifugal mixer 1 via the inlet 3.
  • the centrifugal mixer 1 comprises a drum 13 in which a rotating shaft 2 is located.
  • the shaft 2 is connected to the centrifugal mixer via pivot bearings 8 .
  • the shaft 2 has a multiplicity of pins 7 arranged on it.
  • the pins 7 are preferably arranged in a spiral shape in order to ensure that the mass is advanced.
  • centrifugal mixers without a spiral arrangement can also be used.
  • the diameter d of the shaft, the length L and the arrangement of the pins 7 and the inner diameter D of the centrifugal mixer can vary depending on the throughput and application.
  • the distance between the pin tips and the inner wall of the centrifugal mixer can also vary.
  • the continuous movement of the pins 7 results in optimal mixing of the mass. Depending on the speed, a reduction in the average diameter of suspended particles is also possible.
  • the fat mass m is pushed through the outlet 4 by the following mass or the feed.
  • the centrifugal mixer 1 preferably has no taper at the outlet 4 .
  • the layer thickness of the processed fat mass m accordingly remains constant over the entire length of the centrifugal mixer 1 .
  • the mass is essentially only processed by the tips of the pins 7 over the length of the mixer. Since the rotational speed and thus the kinetic energy of the pins 7 increase from the shaft to the tip, the constant layer thickness of the mass m ensures that the mass m is processed with a uniform speed and with a uniform energy input. This leads to an increased homogeneity of the mass m.
  • the inner diameter D of the drum 13 is preferably 50-500 mm.
  • the diameter d of the shaft 2 is preferably 20 mm and the length L of the centrifugal mixer 1 is 200 mm; with an inner diameter D of 100 mm, the diameter d of the shaft 2 is preferably 40 mm and the length L of the centrifugal mixer 1 200-400 mm, with an inner diameter D of 400 mm, the diameter d of the shaft 2 is preferably 100 mm and the length L of the centrifugal mixer 1 200-1000 mm.
  • the mass can then be further processed in further processing steps, which take place after the centrifugal mixer 1 in the processing direction 11 .
  • the processing can already be completed after passing through the centrifugal mixer.
  • FIG. 12 schematically shows another embodiment of the present invention.
  • the fat mass m runs through a rolling mill 5 arranged after the centrifugal mixer 1 in the processing direction 11.
  • the rolling mill 5 can have any number of rollers, but 2-, 3- or 5-rollers are preferred.
  • the use of at least one centrifugal mixer can allow the use of a 3-roller instead of a 5-roller without sacrificing the quality of the end product.
  • the speed of the shaft 2 the parameters which determine the consistency of the fat mass m can be set to a predetermined value which is optimal for the subsequent rolling process in the rolling mill 5.
  • adjustments to the rolling mill 5 can be avoided.
  • the properties of the end product can be changed.
  • the throughput of the mass can also be controlled by selecting the speed.
  • FIG 3 Another embodiment of the invention can be seen.
  • the fat mass m or the individual components k is first rolled through a pre-rolling mill 6 which is arranged in front of the centrifugal mixer in the processing direction 11 .
  • the average diameter of suspended particles in the mass and the particle diameter of solid components are already reduced upstream of the centrifugal mixer 1 .
  • the components are mixed and/or comminuted in a centrifugal mixer.
  • the fat mass m can then be passed through a further rolling mill 5 arranged after the centrifugal mixer 1 in the processing direction.
  • the fat mass m or the individual components k can only be processed by the steps of rolling in pre-roller 6 and mixing and/or comminution in centrifugal mixer 1 without the mass m then being rolled in rolling mill 5 .
  • FIG. 12 schematically represents a further preferred embodiment of the invention.
  • the fat mass m or the individual components k are first mixed in the centrifugal mixer 1.
  • the components of the fat mass m are immediately further mixed and/or comminuted in a second centrifugal mixer 21 .
  • the centrifugal mixers can be arranged directly one behind the other or the fat mass can alternatively be conveyed or pumped from the first to the second centrifugal mixer.
  • a further embodiment not shown provides that further centrifugal mixers are arranged downstream of the second centrifugal mixer.
  • the individual centrifugal mixers can have different sizes and pin configurations.
  • the speeds of the shafts 2, 22 can be different.
  • a fat mass can be continuously liquefied by such an arrangement.
  • figure 5 12 is a schematic representation of a first embodiment of a centrifugal mixer 31 with a shaft 32 supported on two ends.
  • a first bearing 38 is located near the inlet 33, a second bearing 39 near the outlet.
  • the shaft 32 is mounted more stably if it is supported on two sides.
  • the bearing mount for the second bearing 39 is not connected directly to the drum 13 but is preferably attached to a base plate 14 . As a result, the two pivot bearings 38, 39 are decoupled from one another.
  • the shaft 32 can extend beyond the length L of the drum 13 .
  • Pins 37 are preferably also arranged in the protruding area of the shaft 32, which promote the concentric discharge.
  • the pins 37 can be longer than the pins 7 in this area.
  • figure 6 is a schematic representation of a second embodiment of a centrifugal mixer 41 with a shaft 42 supported on two ends.
  • a first bearing 48 is located near the inlet 43, a second bearing 49 near the outlet 44.
  • the bearing mount for the second bearing 49 is connected directly to the drum 13. It is fastened via connecting webs 17, between which sufficiently large exit windows remain free, so that there is a quasi-concentric outlet opening 44 and the mass m can exit without back pressure.
  • the inner wall can be textured for improved wall adhesion.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Confectionery (AREA)

Claims (17)

  1. Procédé pour le traitement d'une masse de matière grasse (m), à savoir d'une masse de cacao ou de chocolat, dans lequel les composants (k) de la masse de matière grasse (m) sont, dans un mélangeur centrifuge ouvert (1 ; 21 ; 31 ; 41), qui permet une évacuation libre de façon qu'il n'en résulte pas de retenue de la masse de matière grasse, broyés, ou broyés et mélangés, le diamètre des particules en suspension dans la masse de matière grasse subissant une réduction, et la matière grasse étant envoyée dans un tambour disposé pour l'essentiel horizontalement, dans lequel se trouve un arbre tournant, qui au moins partiellement est pourvu d'aiguilles, qui sont disposées de telle sorte que la vitesse de rotation des aiguilles augmente de l'arbre vers la pointe, l'extrémité du tambour étant ouverte et n'étant pas rétrécie ou seulement dans une faible mesure, et l'ouverture étant orientée dans la direction de l'axe de l'arbre, et la vitesse que les aiguilles (7 ; 37) disposées sur l'arbre du mélangeur centrifuge présentent en leur extrémité étant comprise entre 5 et 600 km/h, et la totalité de la masse (m) présente dans le mélangeur centrifuge (1 ; 21 ; 31; 41) étant traitée essentiellement à cette vitesse.
  2. Procédé selon la revendication 1, caractérisé en ce que le diamètre des composants (k) de la masse de matière grasse (m) subit, grâce au mélangeur centrifuge (1 ; 21 ; 31 ; 41), une réduction allant pour l'essentiel à une valeur inférieure à 200 µm, en particulier inférieure à 150 µm.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que la vitesse de rotation de l'arbre (2 ; 22 ; 32 ; 42) du mélangeur centrifuge (1 ; 21 ; 31 ; 41) est comprise dans la plage de 500 à 6000 tr/min, de préférence dans la plage de 1000 à 4000 tr/min.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'au moins un paramètre, qui est caractéristique de la consistance de la masse de matière grasse (m), comme p.ex. sa viscosité ou son humidité, est ajusté à une valeur prédéfinie grâce au choix approprié de la vitesse de rotation de l'arbre (2 ; 22 ; 32 ; 42) dans le mélangeur centrifuge (1 ; 21 ; 31 ; 41).
  5. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que, dans une étape supplémentaire, la masse de matière grasse (m) est laminée, en particulier dans un laminoir (5) à 2, 3 ou 5 cylindres.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que les composants (k) de la masse de matière grasse (m) sont, avant leur mélange dans le mélangeur centrifuge (1 ; 21 ; 31 ; 41), prébroyés dans un prélaminoir (6).
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que les composants (k) de la masse de matière grasse (m) sont soumis à un broyage et/ou à un mélange supplémentaire dans au moins un mélangeur centrifuge supplémentaire (21).
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que, dans une étape supplémentaire, les composants (k) de la masse de matière grasse (m) sont traités dans un dispositif de broyage par voie humide, en particulier un broyeur agitateur.
  9. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que le diamètre des constituants en morceaux de la masse de matière grasse (m) subit, lors du traitement de la masse dans le mélangeur centrifuge (1 ; 21 ; 31 ; 41), une réduction à une valeur inférieure à 5 mm, en particulier inférieure à 1 mm.
  10. Utilisation d'au moins un mélangeur centrifuge ouvert (1 ; 21 ; 31 ; 41), comportant un tambour disposé pour l'essentiel horizontalement, dans lequel se trouve un arbre tournant qui au moins partiellement est pourvu d'aiguilles qui sont disposées de telle sorte que la vitesse de rotation des aiguilles augmente de l'arbre vers la pointe, qui permet une évacuation libre, de telle sorte qu'il n'en résulte pas de retenue de la masse de matière grasse, l'extrémité du tambour étant ouverte et ne se rétrécissant pas ou seulement dans une faible mesure, et l'ouverture étant orientée dans la direction de l'axe de l'arbre, pour le traitement d'une masse de matière grasse (m), à savoir d'une masse de cacao ou de chocolat, comportant en particulier des constituants en morceaux, les composants (k) de la masse de matière grasse subissant un broyage, ou un mélange et un broyage, et le diamètre des particules en suspension dans la masse de matière grasse subissant une réduction, et la vitesse que les aiguilles (7 ; 37) disposées sur l'arbre du mélangeur centrifuge présentent à leur pointe étant comprise entre 5 et 600 km/h, et la totalité de la masse (m) présente dans le mélangeur centrifuge (1 ; 21 ; 31 ; 41) étant traitée pour l'essentiel à cette vitesse.
  11. Utilisation d'au moins un mélangeur centrifuge (1 ; 21 ; 31 ; 41) selon la revendication 10, pour le traitement d'une masse de matière grasse (m) avant introduction dans un laminoir (5), de préférence un laminoir à 2, 3 ou 5 cylindres.
  12. Procédé correspondant à la revendication 1, comportant une ligne de production pour le traitement d'une masse de matière grasse (m), à savoir d'une masse de cacao ou de chocolat, à savoir pour le broyage, ou le mélange et le broyage des composants (k) de la masse de matière grasse, le diamètre des particules en suspension dans la masse de matière grasse subissant une réduction, caractérisé en ce que la ligne comprend au moins un mélangeur centrifuge ouvert (1 ; 21 ; 31 ; 41), qui permet une évacuation libre de telle sorte qu'il n'en résulte pas de retenue de la masse de matière grasse, la masse de matière grasse pouvant être envoyée dans un tambour disposé pour l'essentiel horizontalement, dans lequel se trouve un arbre tournant, qui au moins partiellement est pourvu d'aiguilles, qui sont disposées de telle sorte que la vitesse de rotation des aiguilles augmente de l'arbre vers la pointe, l'extrémité du tambour étant ouverte et ne se rétrécissant pas ou seulement dans une faible mesure, et l'ouverture étant orientée dans la direction de l'axe de l'arbre, au moins un laminoir (5), de préférence un laminoir à 2, 3 ou 5 cylindres, étant disposé dans la direction de traitement (11) en aval du mélangeur centrifuge (1 ; 21 ; 31 ; 41), et/ou en ce que, dans la direction de traitement (11), au moins un laminoir (6), de préférence au moins un laminoir à 2 cylindres, est disposé en amont du mélangeur centrifuge (1 ; 21 ; 31 ; 41), et/ou que, dans la direction de traitement (11), au moins un agitateur et/ou un mélangeur sont disposés en amont du mélangeur centrifuge (1 ; 21 ; 31 ; 41), et/ou qu'un dispositif pour le broyage par voie humide, par exemple un broyeur à billes muni d'un agitateur, est disposé sur la ligne.
  13. Procédé selon la revendication 12, caractérisé en ce que le mélangeur centrifuge (1 ; 21 ; 31 ; 41) est disposé sur la ligne de telle sorte que le mélangeur centrifuge (1 ; 21 ; 31 ; 41) soit au moins deux fois traversé par la masse de matière grasse (m) ou au moins par des parties de cette dernière.
  14. Procédé selon au moins l'une des revendications 1 à 9, caractérisé en ce que l'arbre (2 ; 22 ; 32 ; 42) est supporté sur ses deux extrémités.
  15. Procédé selon au moins l'une des revendications 1 à 9 et 14, caractérisé en ce que la paroi intérieure du tambour (13) est structurée, en particulier de telle sorte que l'adhérence, à la paroi intérieure, d'une masse à transporter, en soit favorisée, en particulier la paroi intérieure étant rendue rugueuse et/ou étant ondulée et/ou dentée et/ou munie d'aiguilles.
  16. Procédé selon au moins l'une des revendications 1 à 9, 14 et 15, caractérisé en ce que le mélangeur centrifuge peut être porté à l'équilibre de température, et comprend en particulier une structure à double paroi.
  17. Utilisation selon la revendication 10, avec une ligne de production pour le traitement d'une masse de matière grasse (m), à savoir une masse de cacao ou de chocolat, à savoir pour le broyage, ou le mélange et le broyage des composants (k) de la masse de matière grasse, le diamètre des particules en suspension dans la masse de matière grasse subissant une réduction, caractérisée en ce que la ligne comprend au moins un mélangeur centrifuge ouvert (1 ; 21 ; 31 ; 41), qui autorise une évacuation libre, de telle sorte qu'il n'en résulte pas de retenue de la masse de matière grasse, la masse de matière grasse pouvant être envoyée dans un tambour disposé pour l'essentiel horizontalement, dans lequel se trouve un arbre tournant, qui au moins partiellement est pourvu d'aiguilles, qui sont disposées de telle sorte que la vitesse de rotation des aiguilles augmente de l'arbre vers la pointe, l'extrémité du tambour étant ouverte et ne se rétrécissant pas ou seulement dans une faible mesure, au moins un laminoir (5), et l'ouverture étant orientée dans la direction de l'axe de l'arbre, de préférence au moins un laminoir à 2, 3 ou 5 cylindres, étant disposé dans la direction de traitement (11) en aval du mélangeur centrifuge (1 ; 21 ; 31 ; 41), et/ou qu'au moins un laminoir (6), de préférence au moins un laminoir à 2 cylindres, est disposé dans la direction de traitement (11) en amont du mélangeur centrifuge (1 ; 21 ; 31 ; 41), et/ou qu'au moins un agitateur et/ou un mélangeur est disposé dans la direction de traitement (11) en amont du mélangeur centrifuge (1 ; 21 ; 31 ; 41), et/ou qu'au moins un dispositif de broyage par voie humide, par exemple un broyeur à billes muni d'un agitateur, est disposé sur la ligne.
EP09784018.5A 2009-10-15 2009-10-15 Procédé et utilisation pour le broyage Active EP2488290B2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2009/063446 WO2011044940A1 (fr) 2009-10-15 2009-10-15 Mélangeur centrifuge, procédé et utilisation pour le broyage

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EP2488290A1 EP2488290A1 (fr) 2012-08-22
EP2488290B1 EP2488290B1 (fr) 2016-04-06
EP2488290B2 true EP2488290B2 (fr) 2022-03-30

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ES (1) ES2581392T5 (fr)
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ES2581392T3 (es) 2016-09-05
EP2488290B1 (fr) 2016-04-06
WO2011044940A1 (fr) 2011-04-21
ES2581392T5 (es) 2022-05-13
EP2488290A1 (fr) 2012-08-22

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